Tumbler lock



. B. FREYSINGER.

TUMBLER LOCK.

APPLICATION FILED MAR 31, 192

Patented Oct 11.7, 1922. v

mg i JOHN B. FEEYSINGEE. 0F STAEIEFOED, CUNNEGTICUT, ASSIGNOR TU THEYALE 8:

I E'O'WNE :MANUFACTURENG OOLEPA'FIY, 9F STAIITFQRD, CONNEGTTCUT.

TUMBLEE LOCK.

Application filed March 231,

To all whom it may concern:

Be it known that 1, JOHN B. FREYSINGER, a citizen of the United States,and a resident of Stamford, in the county of Fairfield and State ofConnecticut, have invented certain new and useful Improvements inTumbler Locks; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to an improvement in tumbler locks, preferably ofthe pin tumbler type, and is designed as an improvement on theconstruction disclosed in my pending application No. 530,338 filedJanuary 19th.. 1922.

In the application above referred to the cylinder and tumbler housingsare made up of a series of transverse sections secure to a face plate.

The object of this invention is to make the cylinder of a series ofalternately arranged hard and softer sections, the softer sectionshaving pockets for the tumblers.

A further object is to provide a cylinder constructed as above with aplug provided with protecting armor at opposite sides the key slottherein, so as to prevent the entrance of a cutting or boring toolthrough the plug.

In the accompanying drawings Figure 1 is a view in elevation of acylinder embodying my invention; Figure 2 is a view in front endelevation; Figure 3 is a vertical sectional view on the line 3-3 ofFigure 2; Figure a is a longitudinal view at right angles to that shownin Figure 3 the plug being shown in elevation; Figure is a view in rearend elevation showing the rear or clamping plate; Figure 6 is aperspective view of the plug looking toward the rear end of the latter;Figure 7 is a view in longitudinal section of a modification; Figure 8is a similar view of he same on the line taken at right angles to Figure7, and Figures 9 and 10 are views of details.

10 represents the head or face plate of the cylinder provided centrallywith a bore for the plu 11 which, with the cylinder, carries thetumbler, and which is provided with the usual key slot 12. The faceplate is made of hardened steel and the plug of a softer noncorrosivemetal mounted to turn in the cylinder and the head or face plate of thelatter is 1922. Serial no. 548,4J..

provided with a plurality, preferably two oppositely disposed rearwardlyprojecting integral arms or members 13 which extend back to the rear orclamping plate 14. and are provided with screw holes for screws orrivets by which the rear plate is secured to the rear ends of the armsor members 18.

Located intermediate the two plates 10 and 14;, and slotted or notchedto receive the arm 13, are the alternately arranged, thin hardened steeldisks or plates, 15, and the brass or other softer metal and preferablynon-corrosive disks or plates 16, which are shaped externally to conformto the face plate 10, and are each pro *ided with a central hole or boreto receive the plug 11. The arms or members 13 which as before explainedare integral with the plate 10 terminate in the plane of the rear disk15 or 16 the case may be so that the clamping or rear plate l-l whenapplied or assembled will fit closely against the rear disk and togetherwith the above parts constitutes the cylinder.

The two plates 10 and 14: and the arms or members 13, and the rear plate14 constitute the cylinder in which the plug is mounted. If desired theintermediate plates 15 and 16 may be riveted or otherwise secured asshown in Figure a, and in the present instance I have so shown them.

The plug 11 projects through the cylinder thus formed, and carries atits rear end a cam or other device (not shown) for actuating themechanism of the lock in the usual manner.

The brass disks 16 are preferably wider or thicker than the hardenedsteel disk which separate them, and the chambers or pockets for thetumiblers are formed in these brass or softer metal disks 16 and areoperated by a key in the usual manner. These tumbler chambers may be ofthe single or double con-- struction as preferred in order to permit ofthe removal of the key at half, instead of a full revolution, whichhowever is not material so far as my present invention is con cerned.

The plug 11 is secured within the cylinder in any approved manner, andas shown in Figure 6 is protected by a plurality, preferably four, steelpins 17 driven lengthwise therein from the rear end at opposite sides ofthe key slot and preferably terminate, although not necessarily so, in aplane in front of the first tumbler, and in the preferred constructiondo not pass through the outer face of the plug. The front ends of thesepins 17 are hardened to obstruct or resist the entrance of a cutting orboring tool, the rear ends thereof preferably being left soft formachining.

Instead however of reinforcing the plug by pins as above described, theplug may be constructed on precisely the same principle as the cylinder,that is to say, may be pro vided with a hardened face plate having aplurality of members 13 and alternating hard and softer plates 10 and 14notched to receive said members and secured by a rear or clamping plate14* screwed or riveted to the arms or members 13- as shown in Figures 7and 8.

In all of these constructions the hardened steel plates or pins, preventthe penetration of an ordinary cutting tool and prevent the tumblersfrom being destroyed and thus rendered inoperative and ineffective .by acutting tool entered at the front.

It is evident that instead of forming the members 13 on the face plate,they can be formed on the clamping plate and secured to the face plate,and this is true of the plug, and that other changes in details may bemade without departing from the spirit and scope of my presentinvention.

Having fully described my invention what I claim as new and desire tosecure by Letters-Patent, is

1. In a tumbler lock, the combination of a face plate and 'a rearclamping plate, one of which is provided with a plurality of arms ormembers, the face plate being of hardened metal, and alternatelyarranged hard and softer plates between the face and rear or clampingplate.

2. In a tumbler lock, the combination of two end plates, one of which isprovided with a plurality of rigid arms or members, alternately arrangedhard and softer plates notched to receive the arms on said end plate,the softer plates having pockets for the tumbler or tumblers anddrivers, and means for securing the end and intermediate platestogether.

3. In a tumbler lock, the combination of end plates, an arm or memberintegral with one of said plates and connected with the other,alternately arranged hard and softer plates intermediate the two endplates and held in place by the latterand by the member connecting them,the whole constituting the cylinder of a lock, tumblers mounted inpockets in the softer intermediate plates and a plu mounted to turn insaid cylinder.

4;. In a tumbler lock, the. combination of a face plateand a rear orclamping plate, a series of alternately arranged hard and softer platesbetween the said clamping plates and connected with the latter, the saidend and intermediate plates being connected and constituting thecylinder of the lock, the softer intermediate plates having pockets forthe tumblers, and a plug mounted to turn in said cylinder.

5. In a tumbler lock, the combination of a face plate, a rear orclamping plate secured to the face plate, a series of alternatelyarranged hard and softer plates interposed between the face and clampingplates and secured to the latter, the said plates constituting thecylinder, the softer intermediate plates having pockets for thetumblers, and an armored plug mounted to turn in said cylinder.

6. In a tumbler lock, the combination of a face plate having a pluralityof rearwardly extending members, a rear or clamping plate secured tosaid member, a series of alternately arranged hard and softer platesbetween the face and clamping plate, the said intermediate plates beingnotched to receive the rearwardly extending members on the face plate,and the softer plates having pockets for the tumblers, the said partsconstituting the cylinder of the lock, a key plug mounted to turn insaid cylinder and hardened steel pins within the plug on opposite sidesof the key slots therein.

7 In a tumbler lock, the combination of a face plate of hardened metal,and alternately arranged hard and soft plates: at the rear of the faceplate and secured to the latter.

In testimony whereof, I have signed this specification in the presenceof two subscribing witnesses.

JOHN B. FREYSINGER.

Witnesses:

JAM S L. INGALLS. CHARLES A, BERRY.

